Elliptic spring.



7 No. 664,57l. Patented Dec. 25, I900.

0. monmu. & H. -P WELLS. ELLIPTIG SPRING.

(Application filed Aug. 9, 1900. 1

(in mm.)

UNITED STATES PATENT OFFICE.

OSGOOD MORRILL AND HARLAN P. WELLS, OF AMESBURY, MASSACHUSETTS.

ELL IPTIC SPRING.

SPECIFICATION forming part of Letters Patent No. 664,571, dated December25, 1900.

Application filed August 9, 1900. Serial No. 26,437. (No model.)

To all whom it may concern.

Be it known that we, OSGOOD MORRILL, a citizen of the United States, andHARLAN P. WELLS, a subject of the Queen of Great Britain andIreland,both residing at Amesbury, in the county of Essex and State ofMassachusetts, have invented certain new and useful Improvements inElliptic Springs, of which the following is a specification.

Our invention relates to elliptic springs, and in particular to themaster-leavesand the socket-pieces which unite the leaves, our objectsbeing,.first, the provision of means for preventing the rattling of theloose ends of a leaf or leaves, and, second, the provision ofantifriction-bearings for the ends of the movable leaf or leaves,andwhich antifrictionbearings shall serve when so desired to hold themovable leaf or leaves within the socketpieces and obviate thepossibility of their accidental displacement.

Our invention consists objectively in an elliptic spring'having the endsof the masterleaves united by socket-pieces, and supplemental springsengaging the ends of one of the master-leaves and the socket-pieces.

It further consists in a spring having the ends of a master leaf orleaves engaging balls, so as to facilitate the movement of the said endsof the leaf or leaves and constitute antifriction-bearings.

Finally, it consists in certain novelties of construction andcombinations of parts hereinafter set forth, and specified in theclaims.

The accompanying drawings illustrate two examples of the physicalembodiment of our invention constructed according to the best of theseveral modes we'have so far advised for the practical application ofthe principle.

Figure l is a view in side elevation of an elliptic spring with ourimprovements. Fig. 2 is a side elevation view of one end of the spring,enlarged, and with the end of the socket-piece removed. Fig. 3 is abottom plan view of oneend of the spring, also enlarged. Fig. 4illustrates a second example of our improved spring. Fig. 5 is a sideelevation view of one end of the spring shown in Fig. 4, enlarged, andwith one end of the socketpiece removed. Fig. 6 isa bottom planviewtrate both exam ples, the letterA designates the top master-leavesof the springs; B,the bottom master-leaves; (D,the socket-pieces; D,therecesses made in the sides of the socket-pieces; E, seats for bolts,made adjacent the ends of the upper master-leaves; F, bolts which passthrough holes made in the socket-pieces and frictionally engage theseats E at the ends of the upper master-leaves; G, supplemental springs,each in this instance made in the shape of a leaf having one end withina recess D in a socket-piece and the other end 1ying in contact with thesurface of a masterleaf and outside the socket-piece; H, rivets whichhold the supple mental springs in place, and I are the curved or bentends of the supplemental springs, located within the recesses of thesocket-pieces.

Referring to Figs. 1, 2, and 3, the letter J designates seats made nearthe ends of the lower master-leaf, within which are located the samebolts F F which engage the seats near the ends of the upper master-leaf.

Referring to the second example, (shown in Figs. 4, 5, and 6,) theletter K designates m'etallic' balls or cylinders, L seats for the ballsnear the ends of the upper master-leaf, and M seats for the balls nearthe ends of the lower master-leaf.

The methods of assembling the several constituent parts and elements ofeach spring are obvious from the drawings and need not be specificallyset forth.

It will be observed that in the first exam-,'

ple the ends of each master-leaf are provided with seats for theretaining-bolts, that the bolts hold the socket-pieces immovablerelative to one (the upper) master-leaf, that the recesses in the bodiesof the socket-pieces are large enough to allow movement of the heldimmovable relative to the upper master leaf by the bolts the same as inthe first example, also the supplemental springs serve the same purposeand perform the same functions as the like springs in the first example,although the supplemental springs here hold the ends of the lowermaster-leaf against the ballsinstead of against the bolts.

The second example difiers from the first mainly in having theantifriction balls or cylinders interposed between the adjacent.

ends of the master-leaves at each end of the spring.

On reference to Fig. 5 it will be seen that the ends of the twomaster-leaves adjacent the balls are located a slight distance apart andthat the recess in the socket-piece is enlarged sufficiently to givefree play for the end of the lower master-leaf.

While we have illustrated and described only two complete examples ofthe physical embodiment of our invention, we do not thereby intendtorestrict the scope of the same to such specific examples, inasmuch asour improvements may be applied by other modes in other forms. There maybe employed in lieu of the supplemental spring shown any other suitabletype and differently located, if desired, to perform the functions ofholding the ends of a master-leaf against rattling. Any number of ballsor antifriction-bodies, such as cylinders or rolls, may be placedbetween the ends of adjacent master-leaves. The balls or other movablebodies may be located between the end of a movable masterleaf and thebody of a socket-piece. Both the adjacent ends of two master-leaves mayin some examples be movable upon the antifriction balls or elementsWithin a socketpiece. A modified form or shape of socketpiece may beused in connection with the supplemental spring or the balls and theadjacent ends of the master-leaves, and the cated; and supplementalmetallic springs to prevent rattling.

2. The combination in a spring of masterleaves; socket-pieces; andsupplemental metallic leaf-springs to prevent rattling.

3. The combination in a spring of masterleaves having straight ends;socket-pieces having recesses within which the ends of the master-leavesare located; and supplemental springs having bent ends.

4. The combination in a spring of masterleaves; socket pieces; andsupplemental springs bearing against a socket-piece and a spring andholding the latter against excessive vibration and rattling.

5.. The combination in a springof master leaves; socket-pieces rigidlysecured to the ends of one master-leaf and loosely engaging andretaining the ends of the other master- .leaf; and supplemental springsin connection with the leaf having loose and movable ends.

6. The combination in an elliptic spring, of master-leaves;socket-pieces having recesses, each socket-piece rigidly secured to theend ofone of the master-leaves; and movable antifriction elementsinterposed between the ends of the master-leaves-and which prevent thedis placement of the loose master-leaf from the recesses in the sockets.

'7. The combination in an elliptic spring, of master-leaves;socket-pieces having recesses; bolts holding the ends of one master-leafrigidly in the sockets; and movable antifriction elements which retainthe ends of the other and movable master-leaf within the recesses of thesocket-pieces.

8. The combination in an elliptic spring, of master-leaves havingstraight unbent ends; socketpieces having recesses in the sides thereof;bolts holding the ends of one of the master-leaves rigidly in therecesses of the socket-pieces; the other master-leaf having seats forballs, and balls interposed between the ends of the master-leaves andholding the loose master-leaf against displacement.

9. The combination in an elliptic spring of master-leaves;socket-pieces; means for rigidly holding the ends of one master-leafwithin the socket-pieces; and balls between the ends of the immovablemaster-leaf and the movable master-leaf for holding the latterleaf'within the socket-pieces.

10. The combination in a spring of masterleaves; socket-pieces rigidlysecured to the.

ends of one of the master-leaves and loosely retaining the endsof theother master-leaf; seats M and L in the ends of theimasterleaves; andmovable antifriction elements in the seats.

11. The combination in a spring of masterleaves; socket-pieces;antifriction-bearings; and supplemental springs engaging thesocket-pieces.

12. The combination in a spring of masterleaves; socket-pieces;antifriction-bearings; and leaf supplemental springs, each engaging asocket-piece.

13. An elliptic spring having ball-bearings, and supplemental springsengaging the ends of a master-leaf and socket-pieces to preventrattling.

In testimony whereof We aflix our signa tures in presence of twowitnesses.

- OSGOOD MORRILL.

HARLAN P. WELLS.

